**: Optional, but highly recommended. It allows to install external USB controller in case of compatibility issues between cameras and built-in USB controllers, or if all USB ports are in fact connected to a single USB controller

**: Optional, but highly recommended. It allows to install external USB controller in case of compatibility issues between cameras and built-in USB controllers, or if all USB ports are in fact connected to a single USB controller

** ''Storage system'': HDD or SSD or RAID with write speed:

** ''Storage system'': HDD or SSD or RAID with write speed:

−

*** For 4 cameras at 60 fps, 640 x 480 resolution: not less than 70,4 MByte/sec

+

*** For 4 cameras at 60 fps, 640 x 480 resolution: not less than 17 MByte/sec

−

*** For 6 cameras at 60 fps, 640 x 480 resolution: not less than 105,6 MByte/sec

+

*** For 6 cameras at 60 fps, 640 x 480 resolution: not less than 25 MByte/sec

−

::'''Note''' If your write speed is lower, you can work with 320 x 240 resolution and/or lower frame rate. Alternatively, you can use compressed mode (that gives 3-5 times lower required write speed, but the CPU performance may become a bottleneck)

+

*** For 8 cameras at 60 fps, 640 x 480 resolution: not less than 35 MByte/sec

{{Note|These numbers are valid for "background subtraction" compression mode (default compression mode for PS Eye cameras in [[iPi Recorder]]). But this compression involves additional CPU load. If your CPU is a bottleneck, you can use non-compressed mode that gives 3-5 times higher required write speed, but the CPU load will be reduced.}}

Optional, but highly recommended. It allows to install external USB controller in case of compatibility issues between cameras and built-in USB controllers, or if all USB ports are in fact connected to a single USB controller

Storage system: HDD or SSD or RAID with write speed:

For 4 cameras at 60 fps, 640 x 480 resolution: not less than 17 MByte/sec

For 6 cameras at 60 fps, 640 x 480 resolution: not less than 25 MByte/sec

For 8 cameras at 60 fps, 640 x 480 resolution: not less than 35 MByte/sec

For 12 cameras at 60 fps, 640 x 480 resolution: not less than 50 MByte/sec

For 16 cameras at 60 fps, 640 x 480 resolution: not less than 70 MByte/sec

Note: These numbers are valid for "background subtraction" compression mode (default compression mode for PS Eye cameras in iPi Recorder). But this compression involves additional CPU load. If your CPU is a bottleneck, you can use non-compressed mode that gives 3-5 times higher required write speed, but the CPU load will be reduced.